To recall; to cancel or call a halt to.
To telephone in one's notice of a day's absence from work.
To aim for, go after (a specified objective, situation etc.).
To follow, travel down (a particular way, course of action etc.).
To follow urgently, originally with intent to capture or harm; to chase.
To participate in (an activity, business etc.); to practise, follow (a profession).
To act as a legal prosecutor.